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1.0 GENERAL Model RCI-2950 DX / RCI-2970 DX Frequency Range 12 meter : 24.8900 ~ 24.9900 MHz
10 meter : 28.0000 ~ 29.6900 MHz Tuning Steps 100 Hz, 1 KHz, 10 KHz, 100 KHz, 1 MHz Emission Modes AM(A3)/FM(F3)/LSB,USB(A3J)/CW(A1) Frequency Control Phase-Lock-Loop (PLL) synthesizer Frequency Tolerance ± 0.005 % Frequency Stability ± 0.001 % Operating Temperature Range 0°C to +40°C Microphone 400 ohm, Dynamic PTT Meter Function RF Output, RX Receive Signal Strength, SWR
Calibration and SWR Input Voltage 13.8V DC Antenna Connector UHF SO239 Dimensions For : RCI-2950 DX RCI-2970 DX
7-3/4”(W) x 10-3/4”(L) x 2-3/8”(H) 7-3/4”(W) x 10-3/4”(L) x 3-7/8”(H)
Weight For : RCI-2950 DX RCI-2970 DX
4 lb. 3 oz. 7 lb. 6 oz.
1.1 TRANSMITTER RF Power Output (RCI-2950DX) AM/FM/CW : 10 W ; SSB : 25 W PEP RF Power Output (RCI-2970DX) AM/FM/CW : 50 W ; SSB : 150 W PEP RF Transmit Modes AM/FM/SSB/CW Modulation A3E/16F3/J3E/A1A Spurious Emissions -50 dB Carrier Suppression -50 dB Antenna Impedance 50 Ohms
1.2 RECEIVER Sensitivity For 10dB S/N (AM; CW/SSB) Sensitivity for 12dB S/N (FM)
< 0.5µV; < 0.15µ V < 0.25µV
Image Rejection Ratio -65 dB Automatic Gain Control (AGC) Figure Of Merit SSB/CW/AM : 80 dB for 50 mV for 10 dB Change in
2.0 INTRODUCTION The Ranger RCI-2950 DX / RCI-2970 DX is a solid-state, fully synthesized Amateur 10 and 12 meter dual band mobile transceiver with full band coverage from 28.0000 MHz to 29.6999 MHz and 24.8900 MHz to 24.9900 MHz and all mode operation, including: AM, FM, USB, LSB, CW and PA modes. The 10 most commonly used frequencies can be pre-programmed by the user for easy channel access. 2.1 RCI-2950 DX / RCI-2970 DX FEATURES • 25 Watts PEP of Output Power (RCI-2950 DX) • 150 Watts PEP of Output Power (RCI-2970 DX) • Full Band Coverage • All Mode Operation • Brightness Control • CTCSS Encoder/Decoder (Optional) • Repeater/Offset Switch • Programmable Frequencies • Built-in Dual VFO • RIT (RX Incremental Tuning) • Squelch • Noise Blanker • RF Gain Control • RF Power Output Selector • External Speaker Connection • PA Mode • LCD Display • Multi-Function LCD Meter
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RCI-2950 DX RCI-2970 DX
CHAPTER 3 OPERATION
Figure 3-1 Front Panel 3.0 INTRODUCTION This section explains the basic operating procedures for the RCI-2950 DX / RCI-2970 DX Amateur 10 and 12 meter dual band mobile transceiver. 3.1 CONTROL AND CONNECTIONS 3.1.1 FRONT PANEL Refer to the above Figure 3-1 for the location of the following controls. 1. FREQUENCY SELECTOR This control is used to select a desired transmit and receive frequency. 2. RF POWER CONTROL This control allows the user to adjust RF power output. 3. MIC GAIN CONTROL Adjusts the microphone gain in the transmit and PA modes. This controls the gain to the extent that full talk power is available several inches away from the microphone. In the Public Address (PA) mode, the control functions as the volume control.
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4. ON/OFF VOLUME CONTROL This knob controls the volume and the power to the radio. To turn the radio on, rotate knob clockwise. Turning the knob further will increase the volume of the receiver. 5. SQUELCH CONTROL This switch is used to eliminate background noise being heard through the receiver which can be disturbing when no transmissions are being received. To use this feature, turn the switch fully counterclockwise and then turn clockwise slowly until the background noise is just eliminate. Further clockwise rotation will increase the threshold level, which a signal must overcome in order to be heard. Only strong signals will be heard at a maximum clockwise setting. 6. RF GAIN CONTROL This control is used to reduce the gain of the RF amplifier under strong signal conditions. 7. CLARIFIER CONTROL Allows tuning of the receive frequency above or below the assigned frequency by up to 500 Hz. Although this control is intended primarily to tune in SSB/CW signals, it may be used to optimize AM/FM signals. 8. MODE (FM/AM/USB/LSB/CW/PA) SWITCH This switch allows you to select one of the following operating modes: FM/AM/USB/LSB/CW/PA. 9. NB/ANL BUTTON (NB/ANL) In the NB/ANL position, the RF Noise Blanker and Aotumatic Noise Limiter in the audio circuits are also activated. The Noise Blanker is very effective in eliminating repetitive impulse noise such as ignition interference. 10. ROGER BEEP BUTTON (R.BEEP) In the Roger Beep position, the radio transmits an audio tone at the end of your transmission to indicate that transmission has ended. As a courtesy to others, use the Roger Beep only when necessary. 11. SPLIT BUTTON (SPLIT) This control activates the offset frequency function. It causes the transmit frequency to be offset either above or below the receive frequency by a user programmable amount to allow operation of an FM Repeater. 12. PROGRAM BUTTON (PRG) This button is used to program operating or scanning frequencies into memory. See the OPERATION section of the manual for further details. 13. MANUAL BUTTON (MAN) This is used to return the unit to manual mode. 14. SHIFT BUTTON (SHF) This is used to select 100 Hz, 1 KHz, 10 KHz, 100 KHz or 1 MHz frequency steps. 15. DIM BUTTON (DIM) This button adjusts the display backlighting in four different steps to best match the ambient light.
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16. SWR BUTTON (SWR) This control is used to check SWR. 17. SCAN BUTTON (SCAN) This is used to scan frequencies in each band segment. The OPERATION segment of this manual provides detailed information on using the SCAN control. 18. MEMORY BUTTON (MEM) This button is used to program memory channels. Detailed information on how to use this control is provided in the OPERATION section of this manual. 19. ENTER BUTTON (ENT) This is used to program frequencies in memory. See the OPERATION section of this manual for more information on using this control. 20. LOCK BUTTON (LOCK) This button is used to lock a selected frequency. Press it to activate the switch. In this position, it disables the Frequency Selector Control, up/down buttons on the front control panel and remote up/down buttons on the microphone. Repressing the switch will unlock the frequency. 21. UP/DOWN SELECTOR (στ) These buttons are used in conjunction with the shift key to move the frequency upward or downward to select a desired frequency. 22. METER This meter indicates received signal strength, transmitter RF output power and SWR level. 23. LCD DISPLAY The LCD displays the frequency selected, functions and memory channel. 24. MIC JACK Accepts 6 pin female connector with a type Philmore T616C or Calrad 30445 style connector.
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3.1.2 REAR PANEL Figure 3-2 represents the location of the following connections:
Figure 3-2 Rear Panel 1. ANTENNA This jack accepts 50 ohms coaxial cable with a PL-259 type plug. 2. CW KEY This jack is for Morse code operation, To operate, connect a CW key to this jack and place the MODE switch in the CW position. 3. EXT. SP. This jack accepts 4 to 8 ohms, 5 watts external speaker. When the external speaker is connected to this jack, the built-in speaker will be disabled. 4. PA. SP. This jack is for PA operation. Before operating, you must first connect a PA speaker (8 ohms, 5 W) to this jack. 5. POWER This connector accepts 13.8V DC power cable with built-in fuse. The power cord provided with the radio has a black and red wire. The black goes to negative and the red goes to positive.
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3.2 MICROPHONE 1. PTT SWITCH The receiver and transmitter are controlled by the push-to-talk switch on the microphone. Press the switch and the transmitter is activated, release switch to receive. When transmitting, hold the microphone two inches from the mouth and speak clearly in a normal voice. 2. REMOTE UP/DOWN SWITCH An operating frequency can be incremented or decremented simply by pushing either of these buttons. 3.3 OPERATION 3.3.1 CHANNEL SELECTION Frequency selection for the RCI-2950 DX / RCI-2970 DX is simple. Select a desired operating frequency by rotating the Frequency Selector, or using the (σ) Up and (τ) Down buttons on the front panel or the microphone. Press the LOCK button to lock into the selected frequency. This will disable the Frequency Selector and the up/down buttons on the front panel and the microphone. Repressing the LOCK button unlocks the frequency. Use the SHF button to step frequency in either 100 Hz, 1 KHz, 10 KHz, 100 KHz or 1 MHz increment when you select a band segment. The frequency step is indicated by a small triangle directly under the corresponding digit on the frequency display. 3.3.2 MODE SELECTION To select an operating mode on your RCI-2950 DX / RCI-2970 DX, simply rotate the MODE selector and place it in the desired operating mode position. FM/AM/USB or LSB modes are for your voice communications. In the CW position, you can transmit CW if you have connected an external key to the accessory jack provided on the back of the radio. In the PA position, the transceiver can be used as a Public Address system. Before operating in PA mode, you must first connect a PA speaker (8 ohms, 5 Watts) to the jack located on the rear panel. 3.3.3 RF POWER CONTROL This feature allows the adjustment of the RF output power continuously for the RCI-2950 DX (AM 1W to 10W; SSB: 10W to 25W), and (AM: 8W to 50W; SSB: 18W to 100W) for the RCI-2970 DX. 3.3.4 RECEIVE SCANNING Receive scanning allows you to find active frequencies in the entire band segment. To begin scanning, slowly turn the Squelch control clockwise until the receiver noise disappears. Press the Scan button. The unit should start scanning from the lower to the higher frequencies. Pressing the Scan button again will change the direction of scanning. Each time you press the Scan button, “SCAN+” or “SCAN-” will displayed on the LCD display. The radio will stop on any active frequency for the entire duration of the transmission. When the transmission stops, the RCI-2950 DX / RCI-2970 DX will wait approximately 2 seconds before it resumes scanning. If you want to deactivate Scan mode while it is scanning, press the MAN (manual) button or turn the Squelch control counterclockwise until you hear the receiver noise. The Manual button will disable Scan function.
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3.3.5 SPLIT FUNCTION This function enables you to offset the transmit and receive frequencies for FM repeater operation. The transmitter frequency can offset either higher or lower than the receive frequency. To split frequencies, press the MAN button and the Split button to select either +/- split frequency. If the + split is selected, the transmit frequency will be higher than the receive frequency. If - split is selected, the transmit frequency will be lower than the receive frequency. 3.3.6 MEMORY FUNCTION The RCI-2950 DX / RCI-2970 DX can store up to 10 most frequently used frequencies (from 0 to 9). To program a frequency into memory, follow the procedure described below: (1) Press the MAN button. (2) Press the PRG button. (3) Press the MEM button (“MEMORY” and “0” should appear on the left-hand side of the LCD
display). Pressing the MEM button will advance the channel number from “0” to “9”. (4) Select the desired frequency you wish to store in memory. (5) Press the ENT button. (6) Repeat the same procedure to program other memory channels. 3.3.7 MEMORY CHANNEL SCANNING You can scan and select any of these 10 preset frequencies by following the procedure described below: (1) Press the MAN button. (2) Press the MEM button. (3) Slowly turn the Squelch knob clockwise until the receiver noise disappears. (4) Press the Scan button. The unit will scan from lower to higher frequencies. When you press the
button again, it will scan from higher to lower frequencies. (5) To stop scanning a certain channel, press the MAN button, or turn the Squelch knob
counterclockwise until you hear the receiver noise. 3.3.8 METER The meter built into your RCI-2950 DX / RCI-2970 DX on the left hand side of the LCD display provides the following information: 1. S/RF METER In transmit mode, it provides a visual indication of transmit output power and received signal strength on the receive mode. 2. SWR METER
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In order to achieve maximum radiated power, it is important that your antenna be in good condition, properly adjusted and matched to your transceiver. The built-in SWR (Standing Wave Ratio) meter allows you to measure your antenna condition. To operate this function, connect your antenna to the transceiver antenna connector, set the mode switch to AM and adjust the MIC GAIN to minimum. Select a frequency near the middle of the band you plan to use most. Activate the SWR function and press the PTT button on the microphone. A bar on the meter is an indication of the antenna matching. If there is no bar, it indicates that your antenna system is perfectly matched. The fewer bars, the better matched. If several bars appear, your antenna needs adjusting. 3.3.9 CTCSS - OPTIONAL The RCI-2950 DX / RCI-2970 DX can operate with CTCSS frequencies for accessing repeaters, with an optional CTCSS (Continuous Tone Coded Squelch System) encoding device installed. 3.3.10 PROCEDURE TO RECEIVE (1) Be sure that power source, microphone and antenna are connected to the proper connectors before
going to the next step. (2) Turn unit on by running VOL knob clockwise on transceiver. (3) Set the VOL to a comfortable listening level. (4) Set the MODE switch to the desired mode. (5) Listen to the background noise from the speaker. Turn the SQ knob slowly clockwise until the noise
just disappears. The SQ is now properly adjusted. The receiver will remain quiet until a signal is actually received. Do not advance the control too far or some of weaker signals will not be heard.
(6) Set the CHANNEL selector switch to the desired channel. (7) Set the RF GAIN control fully clockwise for maximum receive gain. (8) Adjust the CLARIFIER control to clarify the SSB signals or to optimize AM/FM signals. 3.3.11 PROCEDURE TO TRANSMIT (1) Select the desired channel of transmission (2) Set the MIC GAIN control fully clockwise. (3) If the channel is clear, depress the push-to-talk switch on the microphone and speak in a normal
voice.
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RCI-2950 DX RCI-2970 DX
CHAPTER 4 PROGRAMMING
4.0 INTRODUCTION This section explains the basic programming procedures for the RCI-2950 DX / RCI-2970 DX Amateur 10 and 12 meter dual band mobile transceiver. 4.1 FREQUENCY SELECTION Frequency selection in the RCI-2950 DX / RCI-2970 DX can be accomplished using anyone of the three following methods: (1) The first method of frequency selection is through the use of the SHF (Shift) key and the (σ) Up
and (τ) Down arrows. To accomplish this, press the SHF button until the cursor arrow is positioned under the digit of the frequency that is to be changed, then use the (σ) Up arrow to increase the number. If a decrease in frequency is desired, press the (τ) Down arrow. Perform the steps described above for each digit of the frequency until the desired frequency is displayed in the LCD display window.
(2) The second method of frequency selection is accomplished using the SHF button and the frequency
select knob located above the microphone jack. Use the SHF button in the manner described above to select the digit to be changed. Proceed to rotate the frequency select knob clockwise to increase the frequency. Rotate the frequency select knob counterclockwise to decrease the frequency.
(3) The third method of selecting the operating frequency of the radio is through the use of the SHF
button and the Channel (σ) Up and (τ) Down buttons located on the microphone. Frequency selection by this method is accomplished in the same manner as with the (σ) Up and (τ) Down arrows on the keypad. The only difference is that the Channel Up and Down buttons on the microphone are used.
4.2 FREQUENCY SCANNING Frequency scanning can be achieved using one of two methods: the first method involves the scanning of pre-programmed memory channels. The second method permits the user to scan all frequencies between a pre-set upper and lower scan limit. 4.2.1 ALL FREQUENCY SCANNING To allow all Frequency Scanning, one must first program the upper and lower scanning limits. The scan limits are simply the highest and lowest frequencies that will be scanned. To program these limits, perform the following steps: (1) Press the PRG (Program) key. (2) Press the SCAN key (“PRG SCAN+” should appear in the lower right corner of the display
window). (3) Using the SHF key and the (σ) Up and (τ) Down arrows, select the upper scan limit, then press
ENT.
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(4) Press the SCAN key again (“SCAN-” should appear in the display window). (5) Using the SHF key and (σ) Up and (τ) Down arrows, select the lower scan limit, then press ENT. The upper and lower scan limits have now been programmed. To activate the scan feature, return the radio to manual operation and press the SCAN button. If the display shows “SCAN+”, the radio will scan from the lower limit to the upper limit. If “SCAN-” is displayed, the unit will scan from the upper limit to the lower limit. To change from SCAN+ to SCAN- or vice versa, press SCAN.
NOTE When programmed, the upper and lower scan limits will also act as the upper and lower operating limits of the radio. The radio now cannot be programmed to operate above or below the scan limits.
4.2.2 MEMORY SCANNING The RCI-2950 DX / RCI-2970 DX has 10 non-volatile (i.e. memory resident) memory locations which can be programmed with any available frequency within the operating band of the radio. The scan function of the unit can be programmed to scan these memory channels. The radio will then scan only those memory channels which have been programmed. The first step in utilizing the memory scan function is to program the desired frequencies into the radio memory. This can be accomplished by performing the following steps: (1) With the radio operating in the manual mode, press the PRG (Program) key. (2) Press the MEM (Memory) key. “PRG” should be displayed in the lower right-hand corner of the
LCD display window. In the upper left portion of the display, “MEMORY” should be displayed. Directly below MEMORY, a number between 0 and 9 will be displayed. This number represents the memory location currently being displayed. Pressing the MEM key will increase the memory counter to the next memory location and the contents of that memory location will be displayed.
(3) Using the SHF key and the (σ) Up and (τ) Down arrows, enter the frequency to be stored in the
memory location displayed. After the desired frequency has been entered, press ENT. (4) Repeat steps (2) and (3) for all the memory locations to be programmed. (5) After all desired memory locations have been programmed with frequencies, return the unit to the
manual mode of operation by pressing the MAN key. (6) To initiate memory scanning, press MEM and then press SCAN. As previously discussed, the
display will show “SCAN+” or “SCAN-” to indicate whether the radio is scanning from the lowest or the highest memory location or vice versa.
(7) To return the radio to normal (non-scanning) operation, press the MAN key. 4.3 OFFSET FREQUENCY OPERATION
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The RCI-2950 DX / RCI-2970 DX has an offset or split frequency feature that will permit the radio to be operated in a half-duplex mode. This will allow the user to talk on FM repeaters operating in the 10 and 12 Meter bands.
NOTE The FM repeaters may require a subaudible (CTCSS) tone be transmitted to gain access to the repeater. The RCI-2950/2970 DX is not factory equipped with a CTCSS encoder/decoder.
The split frequency function offsets the transmitter frequency either above or below the receive frequency by a user programmable amount. In the following example, programming of a 100 KHz offset will be described. Before attempting to program the offset frequency, ensure that the radio is operating in the manual mode by pressing the MAN key. (1) Press the PRG (Program) key. (2) Press the SPLIT key. The LCD display window will display “00000” with “PRG” and “SPLIT”
being displayed in the lower left-hand corner. (3) Using the SHF key and the (σ) Up and (τ) Down arrows as described earlier, program the display to
read “010000”. (4) Press ENT. A 100 KHz offset has now been programmed into the radio. (5) Return the radio to manual operation by pressing the MAN key. (6) Using the SHF key and the (σ) Up and (τ) Down arrows as described previously, set the radio for
the desired receive frequency. (7) Press SPLIT. In the lower right corner of the display, either “SPLIT+” or “SPLIT-” will be
displayed. If SPLIT+ is displayed, the transmitter will be offset 100 KHz above the receive frequency when keyed. If SPLIT- is displayed, the transmitter will be offset 100 KHz below the receive frequency.
NOTE When the transmitter is keyed, the frequency display will change to show the frequency being transmitted.
(8) To return the radio to simplex operation (i.e., same transmit and receive frequency), press the MAN
key.
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RCI-2950 DX RCI-2970 DX
CHAPTER 5 CIRCUIT
DESCRIPTION 5.0 INTRODUCTION This section explains the technical theory of operation for the RCI-2950 DX / RCI-2970 DX mobile transceiver. 5.1 PLL CIRCUIT The Phase Lock Loop (PLL) circuit is responsible for developing the receiver’s first local oscillator signal and the transmitter’s exciter signal. The PLL circuit consists primarily of IC2, IC3, Q29, Q32, Q33, Q34, Q36, Q37, Q38 and L16. The PLL circuit is programmed by the rotary channel switch GPS-0688. The switch allows IC (U601) on CPU P.C.B to communicate the correct binary data information to the programmable divider inside of IC2. IC2 then controls the VCO (Voltage Controlled Oscillator) to oscillate on the correct frequency. This signal is fed either into the receiver’s first mixer (for receive operation) or the transmitter’s mixer (for transmit operation). 5.2 RECEIVER CIRCUIT The incoming receives signal come into the radio via the antenna and into the front-end pre-amp consisting of Q19. The RF signal is fed into the mixer circuit of the Q20 and Q21. The signal is then filtered by L8, L9 and L10 then into the AM/FM IF section of the receiver (depending on the mode of operation). The signal is then detected by either the AM detector FM detector and then fed to the audio amplifier section of the receiver and finally out to the speaker. 5.3 TRANSMITTER MODULATION CIRCUIT (1) The transmitter modulation circuit modulates the low-level RF signal from the PLL exciter circuit
with the user’s audio voice signal from the microphone. The audio from the microphone is then amplified and fed into the balanced modulator circuit.
(2) If the transceiver is in the AM mode, the AF power amplifier modulates the last RF amplifier which
produces a true amplitude modulated RF signal. (3) If the transceiver is in the FM mode, the audio signal is not mixed with 10.6975MHz oscillator but
instead phase modulates the basic exciter signal from the PLL circuit in the TX mixer. (4) If the transceiver is in the SSB mode, the audio signal is mixed with 10.6975MHz oscillator in IC5. 5.4 TRANSMITTER AMPLIFIER CIRCUIT The transmitter takes the basic exciter signal from the TX mixer and amplifies it through a series of amplifiers consisting of Q64, Q63, Q62, Q61, Q60 and the EPA010010A amplifier (only for RCI-2970 DX) where it is sent out to the antenna connector.
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RCI-2950 DX / RCI-2970 DX CPU CIRCUIT DIAGRAM
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RCI-2950 DX RCI-2970 DX
CHAPTER 6 ALIGNMENT
6.0 REQUIRED TEST EQUIPMENT DC Power Supply (13.8VDC, 20A) RF Wattmeter (100W) Multimeter Automatic Modulation Meter Audio Signal Generator
Frequency Counter (100 MHz) RF Signal Generator (100 MHz) Automatic Distortion Meter Oscilloscope (50 MHz) Sinad Meter
6.1 ALIGNMENT PROCEDURES This transceiver has been aligned at the factory and does not require any adjustments at installation. The required test equipment listed are used for the test setup or alignment shown in Figure 6-1 Transmitter Test Setup and Figure 6-2 Receiver Test Setup. These test setups are used in part or total during the following adjustments and refer to Page 44 for adjustment location. 6.1.1 PLL ALIGNMENT ITEM U.U.T. SETTING ADJUST
POINT MEASUREMENT
PLL 2 VCO Voltage
Set radio to 24.890 MHz, AM RX mode. Frequency setting at 29.699 MHz. Connect Multimeter to TP10.
L14 1.0 VDC ± 0.1 ≤ 4.5 VDC
PLL 1 VCO Voltage
Set radio to 24.890 MHz, AM RX mode. Frequency setting at 32.000 MHz. Connect Multimeter to TP11.
L13 1.0 VDC ± 0.1 ≤ 6.5 VDC
AM Frequency Set radio to AM RX mode. Set Clarifier Control to 12 o’clock. Connect Frequency Counter to TP16.
VC2
10.1000 MHz ± 10 Hz
TX Frequency Set radio to AM TX mode. Connect Frequency Counter to TP16.
VR8 10.1000 MHz ± 10 Hz
VCO Output Set radio to 28.000 MHz, AM RX mode. Connect Oscilloscope to TP3.
L17 Maximum Output 38.6950 MHz @ TP3
AM OSC Set radio to AM TX mode. Mod off. Connect Frequency Counter to TP5.
L18 10.6950 MHz ± 10 Hz
USB OSC Set radio to USB TX mode. Mod off. Short TP6 to ground. Connect Frequency Counter to TP5.
L20
10.6975 MHz ± 10 Hz
LSB OSC Set radio to LSB TX mode. Mod off. Connect Frequency Counter to TP5.
L19 10.6925 MHz ± 10 Hz
6.1.2 TRANSMITTER ALIGNMENT
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RCI-2970DX LEVELS ARE SHOWN IN [].
ITEM U.U.T. SETTING ADJUST POINT
MEASUREMENT
TX Power Set radio to 28.000 MHz, AM TX mode. Modulation off. Set radio to 28.000 MHz, USB TX mode. AF signal 30mV, 1 KHz to microphone. Connect Oscilloscope to TP17. Set RF PWR Fully Clockwise. Set Clarifier Control to 12 o’clock. Set radio to 24.890 MHz & 29.699 MHz.
L18,L37,L35, L34 L35,L34
Maximum Output. Maximum Output and Balance.
AM APC Set radio to AM TX mode. Connect Multimeter to TP8
VR15
6 VDC
SSB APC Set radio to USB TX mode. Connect Multimeter to TP8
VR18 12.5 VDC
BIAS Current Set radio to USB TX mode. Modulation off. Connect current meter to TP7(+) and TP9(-) Connect current meter to TP7(+) and TP8(-)
VR13 VR12 + VR11
10 mA (50 mA + 50 mA) = 100 mA
AM TX Power Set radio to 28.000 MHz, AM TX mode. Modulation off. Connect “short PCB” to TP7 and TP9. Set RF PWR Fully Counter Clockwise. Connect RF Power Meter to antenna jack.
VR15 VR19
10W [50W] 1W [8W]
RF Power Meter Set radio to 28.000 MHz, AM TX mode. Set RF Power Fully Clockwise.
VR10 Level Meter Indicator
SSB ALC Set radio to USB TX mode. AF signal 30 mV, 1 KHz to microphone.
VR14
25W [150W, PEP]
SSB Carrier Balance
Set radio to USB TX mode. AF signal 30 mV, 1 KHz to microphone. Connect Oscilloscope to antenna jack.
VR7 Spurious Emission to minimum.
CW TX Set radio to 28.000 MHz, CW TX mode. Plug in CW Key. Disconnect the Mic Jack. Connect AC Voltmeter to EXT SP.
VR9 200mV (Sine Wave)
AM Modulation FM Modulation
Set radio to 28.000 MHz, AM TX mode. Set radio to 28.000 MHz, FM TX mode. AF signal 30 mV, 1 KHz to microphone. Set Mic Gain Fully Clockwise.
VR17 90% 4 KHz
6.1.3 RECEIVER ALIGNMENT
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ITEM SETTINGS ADJUST
POINT MEASUREMENT
AM Sensitivity Set radio to 28.000 MHz, AM RX mode. Set Clarifier Control to 12 o’clock. Set RF Gain Fully Clockwise. Set SQ Fully Counter Clockwise. Set NB/ANL/OFF switch to OFF position. Set VOL Control at 2 o’clock. Connect RF SG to antenna jack Frequency 28.000 MHz, 1uV. Mod 30%. Set radio to 24.890 MHz, AM RX mode. RF SG setting 24.890 MHz. Set radio to 29.699 MHz, AM RX mode. RF SG setting 29.699 MHz.
L5,6,7,8,9,10,2,3 L5,L6, L7
Audio Output > 2V S/N > 10 dB Balance between 24.890 and 29.699 MHz
USB Sensitivity
Set radio to USB RX mode. Set VOL Control Fully Clockwise. RF SG setting 28.001 MHz, 0.5uV. Mod off.
L11, L12 Audio Output > 2V S/N > 10 dB
LSB Sensitivity
Set radio to LSB RX mode. Set VOL Control Fully Clockwise. RF SG setting 27.999 MHz, 0.5uV. Mod off.
L11, L12 Audio Output > 2V S/N > 10 dB
FM Distortion Set radio to 28.000 MHz, FM RX mode. Set MODE switch to FM mode. RF SG setting 28.000 MHz, 1mV. Mod 3KHz.
L4 Audio Output > 3V Distortion < 10%
NB Adjust Set radio to 28.000 MHz, AM RX mode. RF SG setting 28.000 MHz, 100uV. Mod off. Set NB/ANL/OFF switch to NB/ANL position. Connect Voltmeter to TP1.
L1 DC Voltage to max. > 2V
AM Squelch Set radio to 28.000 MHz, AM RX mode. Set SQ Control Fully Clockwise. RF SG setting 28.000 MHz, 1mV. Mod 30%.
VR4 Slowly Adjust very slowly until squelch just open.
SSB Squelch
Set radio to USB RX mode. Set SQ Control Fully Clockwise. RF SG setting 28.001 MHz, 1mV. Mod off.
VR3 Slowly Adjust very slowly until squelch just open.
AM S/RF Meter AM S-Meter
Set radio to 28.000 MHz, AM RX mode. RF SG setting 28.000 MHz, 100uV. Mod 30%.
VR1 “6 bar” on the Level Meter Indicator.
SSB S-Meter
Set radio to USB RX mode. RF SG setting 28.001 MHz, 100uV. Mod off.
VR2 “6 bar” on the Level Meter Indicator.
Figure 6-1 Transmitter test setup
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Figure 6-2 Receiver test setup
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RCI-2950 DX RCI-2970 DX
CHAPTER 7 MAINTENANCE
7.0 PRECAUTIONS The inherent quality of the solid-state components used in this transceiver will provide many years of continuous use. Taking the following precautions will prevent damage to the transceiver. (1) Never key the transmitter unless an antenna or suitable dummy load is connected to the antenna
receptacle. (2) Ensure that the input voltage does not exceed 16 VDC or fall below 11 VDC. (3) During alignment, do not transmit for more than 10 seconds at a time. Transmitting over long
periods can cause heat built-up and cause transmitter damage. 7.1 PERIODIC INSPECTION This unit is aligned at the factory to deliver maximum performance. However, continued performance cannot be expected without periodic inspection and maintenance. Important points to be checked regularly are as follows;
Check Item Action Whip antenna (option)
If cracked or broken, replace it.
Coaxial cable If sheath is cracked, seal with vinyl tape. If immersed with water, install new coaxial cable.
Coaxial & power plug connections
If loosened, reconnect. If corroded, clean contacts.
Battery connection If corroded, clean power terminals.
Ground terminal If corroded, clean terminal. 7.2 FUSE REPLACEMENT To protect the equipment from serious damage, a fuse is provided on the power supply lines. The fuse protect against overvoltage / reverse polarity or internal fault of the equipment. If the fuse has blown, first find out the cause of the trouble before replacing it. A fuse rated for more than 7A for RCI-2950 DX and 20A for RCI-2970 DX should not be used, since it may permanently damage the equipment. Damage due to overfusing is not covered by the warranty.
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RCI-2950 DX RCI-2970 DX
CHAPTER 8 DIAGRAMS & PARTS LIST
8.0 GENERAL Information on most electrical and mechanical parts is included in the parts list. The reference designators are in alphanumeric order. 8.1 ORDERING REPLACEMENT PARTS Parts orders should be referred to the parts department at:
• Ranger Communications, Inc. 401 W. 35TH ST. NATIONAL CITY, CA 91950-7909 Tel: (619) 426-6440 Fax: (619) 426-3788